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Interactions between Anagrelide and Strattera

1 drug interaction and 15 additional warnings found for the following 2 drugs:

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Drug interactions

Major drug interactions

Major:

anagrelide atomoxetine

Applies to: anagrelide and Strattera (atomoxetine)
Generally avoid

Anagrelide can cause dose-dependent prolongation of the QT interval. Theoretically, coadministration with other agents that can prolong the QT interval may result in additive effects and increased risk of ventricular arrhythmias including torsade de pointes and sudden death. In 60 healthy adult volunteers given single doses of anagrelide, the maximum mean change in QTcI (individual subject correction) from placebo after baseline correction was 7.0 msec after a 0.5 mg dose and 13.0 msec after a 2.5 mg dose. Torsade de pointes and ventricular tachycardia have been reported with anagrelide treatment. In general, the risk of an individual agent or a combination of agents causing ventricular arrhythmia in association with QT prolongation is largely unpredictable but may be increased by certain underlying risk factors such as congenital long QT syndrome, cardiac disease, and electrolyte disturbances (e.g., hypokalemia, hypomagnesemia). In addition, the extent of drug-induced QT prolongation is dependent on the particular drug(s) involved and dosage(s) of the drug(s).

Management

Coadministration of anagrelide with other drugs that can prolong the QT interval should generally be avoided. Patients receiving anagrelide should have a cardiovascular examination, including an ECG, prior to initiation of treatment and monitored for cardiovascular effects during treatment. Hypokalemia or hypomagnesemia must be corrected prior to therapy and electrolytes monitored periodically during therapy. Anagrelide should not be used in the presence of known risk factors for QT interval prolongation such as congenital long QT syndrome or a history of acquired QTc prolongation. Periodic electrocardiograms are recommended in patients with heart failure, bradyarrhythmias, or electrolyte abnormalities. Patients should be advised to seek prompt medical attention if they experience symptoms that could indicate the occurrence of torsade de pointes such as dizziness, lightheadedness, fainting, palpitation, irregular heart rhythm, shortness of breath, or syncope.

References (4)
  1. (2001) "Product Information. Agrylin (anagrelide)." Roberts Pharmaceutical Corporation
  2. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  3. Canadian Pharmacists Association (2006) e-CPS. http://www.pharmacists.ca/function/Subscriptions/ecps.cfm?link=eCPS_quikLink
  4. Cerner Multum, Inc. "Australian Product Information."

Food/lifestyle interactions

No alcohol/food interactions were found. However, this does not necessarily mean no interactions exist. Always consult your healthcare provider.

Disease interactions

15 potential interactions Applies to: 13 conditions, including High Blood Pressure, Depression, Bipolar Disorder, Hypotension, and Psychosis.

Bipolar Disorder

Major:

Strattera

The atomoxetine in Strattera has a major potential interaction with Bipolar Disorder.

Atomoxetine increased the risk of suicidal ideation in pediatric patients with ADHD, and patients should be monitored closely for suicidal thoughts and behavior, clinical worsening, or unusual behavioral changes, especially during initial therapy or dosage changes. Before initiating atomoxetine, patients should be screened for bipolar disorder risk factors, and discontinuation should be considered if treatment-emergent psychotic or manic symptoms occur.

Cardiovascular Conditions and Disorders

Major:

anagrelide

Anagrelide has a major potential interaction with Cardiovascular Conditions and Disorders.

The use of anagrelide may produce a positive inotropic effect, vasodilation, tachycardia, palpitations, and congestive heart failure. Therapy with anagrelide should be administered cautiously in patients with cardiac disease. A cardiovascular examination is recommended prior to beginning therapy with anagrelide.

Moderate:

Strattera

The atomoxetine in Strattera has a moderate potential interaction with Cardiovascular Conditions and Disorders.

Atomoxetine should be used with caution both in patients with conditions that may predispose them to hypotension or abrupt changes in heart rate or blood pressure, and in patients with underlying medical conditions that could be worsened by increases in blood pressure or heart rate, such as hypertension, tachycardia, cardiovascular disease, or cerebrovascular disease. Heart rate and blood pressure should be measured at baseline, following atomoxetine dosage increases, and periodically during therapy to detect clinically important increases.

Cerebral Vascular Disorder

Moderate:

Strattera

The atomoxetine in Strattera has a moderate potential interaction with Cerebral Vascular Disorder.

Atomoxetine should be used with caution both in patients with conditions that may predispose them to hypotension or abrupt changes in heart rate or blood pressure, and in patients with underlying medical conditions that could be worsened by increases in blood pressure or heart rate, such as hypertension, tachycardia, cardiovascular disease, or cerebrovascular disease. Heart rate and blood pressure should be measured at baseline, following atomoxetine dosage increases, and periodically during therapy to detect clinically important increases.

Depression

Major:

Strattera

The atomoxetine in Strattera has a major potential interaction with Depression.

Atomoxetine increased the risk of suicidal ideation in pediatric patients with ADHD, and patients should be monitored closely for suicidal thoughts and behavior, clinical worsening, or unusual behavioral changes, especially during initial therapy or dosage changes. Before initiating atomoxetine, patients should be screened for bipolar disorder risk factors, and discontinuation should be considered if treatment-emergent psychotic or manic symptoms occur.

Glaucoma, Narrow Angle

Major:

Strattera

The atomoxetine in Strattera has a major potential interaction with Glaucoma, Narrow Angle.

The use of atomoxetine is contraindicated in patients with narrow angle glaucoma. In clinical trials, atomoxetine use was associated with an increased risk of mydriasis.

Heart Disease

Major:

Strattera

The atomoxetine in Strattera has a major potential interaction with Heart Disease.

Atomoxetine is contraindicated in patients with severe cardiac or vascular disorders whose condition would be expected to deteriorate if they had clinically important increase in blood pressure (e.g., 15 to 20 mmHg) or heart rate (e.g., 20 beats per minute). Atomoxetine generally should not be used in pediatric patients with known serious structural cardiac abnormalities, cardiomyopathy, serious arrhythmias, or other serious cardiac problems, and clinicians should consider not treating adults with clinically significant cardiac abnormalities, due to the risk of sudden death. Carefully assess cardiovascular history and perform physical exam before treatment, conduct further cardiac evaluation when indicated, and stop atomoxetine pending prompt cardiac evaluation if exertional chest pain, unexplained syncope, or other symptoms suggestive of cardiac disease occur.

High Blood Pressure

Major:

Strattera

The atomoxetine in Strattera has a major potential interaction with High Blood Pressure.

CNS stimulants increase blood pressure and heart rate; the use of some agents may be contraindicated in patients with severe/uncontrolled hypertension. Caution should be used when administering to patients with preexisting high blood pressure (even mild hypertension) and other cardiovascular conditions. All patients under treatment should be regularly monitored for potential tachycardia and hypertension.

Hypotension

Moderate:

Strattera

The atomoxetine in Strattera has a moderate potential interaction with Hypotension.

Atomoxetine should be used with caution both in patients with conditions that may predispose them to hypotension or abrupt changes in heart rate or blood pressure, and in patients with underlying medical conditions that could be worsened by increases in blood pressure or heart rate, such as hypertension, tachycardia, cardiovascular disease, or cerebrovascular disease. Heart rate and blood pressure should be measured at baseline, following atomoxetine dosage increases, and periodically during therapy to detect clinically important increases.

Liver Disease

Major:

anagrelide

Anagrelide has a major potential interaction with Liver Disease.

Anagrelide undergoes extensive metabolism in the liver, with less than 1% recovered unchanged in the urine. Therapy with anagrelide should be administered cautiously in patients with liver disease (bilirubin, SGOT, or other liver measurements greater than 1.5 times normal) and only when the benefits outweigh the risks. Monitoring for signs of liver toxicity is recommended.

Moderate:

Strattera

The atomoxetine in Strattera has a moderate potential interaction with Liver Disease.

Atomoxetine can cause severe liver injury. Atomoxetine exposure is increased in patients with moderate or severe hepatic impairment, and a lower dosage is recommended in these patients. Atomoxetine should be permanently discontinued in patients with jaundice or laboratory evidence of liver injury. Liver enzyme and function tests should be obtained at the first symptom or sign of liver dysfunction.

Pheochromocytoma

Major:

Strattera

The atomoxetine in Strattera has a major potential interaction with Pheochromocytoma.

Atomoxetine is contraindicated in patients with pheochromocytoma or a history of pheochromocytoma. Serious reactions, including elevated blood pressure and tachyarrhythmia, have been reported in patients with pheochromocytoma or a history of pheochromocytoma who received atomoxetine.

Psychosis

Major:

Strattera

The atomoxetine in Strattera has a major potential interaction with Psychosis.

Atomoxetine increased the risk of suicidal ideation in pediatric patients with ADHD, and patients should be monitored closely for suicidal thoughts and behavior, clinical worsening, or unusual behavioral changes, especially during initial therapy or dosage changes. Before initiating atomoxetine, patients should be screened for bipolar disorder risk factors, and discontinuation should be considered if treatment-emergent psychotic or manic symptoms occur.

Pulmonary Impairment

Moderate:

anagrelide

Anagrelide has a moderate potential interaction with Pulmonary Impairment.

The use of anagrelide may cause interstitial lung diseases, including allergic alveolitis, eosinophilic pneumonia, and interstitial pneumonitis. The symptoms may present as progressive dyspnea with lung infiltrations. Close monitoring should be exercised when using this agent in patients with pulmonary dysfunction. It is recommended to discontinue anagrelide and evaluate the patient if symptoms of pulmonary toxicity occur.

Renal Dysfunction

Major:

anagrelide

Anagrelide has a major potential interaction with Renal Dysfunction.

The use of anagrelide has been rarely associated with renal failure most often in patients with serum creatinine values greater than 2.0. Therapy with anagrelide should be administered cautiously in patients with renal dysfunction. Monitoring for signs of renal toxicity is recommended in these patients.

More resources

anagrelide

A total of 440 drugs are known to interact with anagrelide.

Strattera

A total of 444 drugs are known to interact with Strattera.

Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.